Add thorax test models under head and neck

public/models/head/classes.json

@@ -0,0 +1,43 @@
+[
+  "Abdominal diaphragm",
+  "Aorta",
+  "Azygous vein",
+  "Brachiocephalic trunk",
+  "Caudal vena cava",
+  "Cranial vena cava",
+  "Esophagus",
+  "External abdominal oblique",
+  "Iliocostalis",
+  "Latissimus dorsi",
+  "Left atrium",
+  "Left auricle",
+  "Left lung",
+  "Left subclavian artery",
+  "Left ventricle",
+  "Longissimus",
+  "Pectoralis profundus",
+  "Pectoralis superficialis",
+  "Pericardium",
+  "Phrenic nerve",
+  "Primary bronchus",
+  "Pulmonary artery",
+  "Pulmonary trunk",
+  "Pulmonary vein",
+  "Rectus abdominis",
+  "Rectus thoracis",
+  "Recurrent laryngeal nerve",
+  "Rhomboideus",
+  "Right atrium",
+  "Right auricle",
+  "Right lung",
+  "Right ventricle",
+  "Scalenus",
+  "Serratus dorsalis caudalis",
+  "Serratus dorsalis cranialis",
+  "Serratus ventralis",
+  "Spinalis",
+  "Sympathetic chain",
+  "Trachea",
+  "Trapezius",
+  "Vagus nerve"
+]